Is "Disable Startup Delay" safe to switch on?

A nice quality of life change on an SSD. It does nothing for frame rates. The main cost: On a hard disk or a slow processor, everything starting at once can make the first seconds after sign-in feel slower.

Is "Disable Startup Delay" free in Frozen Tweaks?

Yes. It is one of the free tweaks, with no time limit.

StartupDelayInMSec 0: removing the startup app delay in Windows 10 and 11

Frost LIVEWindowsFreeUndo: YesUpdated Oct 8, 2026View as Markdown

Short answer

Updated Oct 8, 2026

After you sign in, Windows waits before it launches your startup apps so the desktop appears first, by default about ten seconds. StartupDelayInMSec set to 0 under the Explorer Serialize key removes that wait. In the registry it sets StartupDelayInMSec to 0 under HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Serialize.

In the app

Disable Startup DelayFREE

Registry

HKCUSoftware\Microsoft\Windows\CurrentVersion\Explorer\Serialize

StartupDelayInMSecNot set0

What the switch writes. Your current value may differ.

What it does

In the app the switch is called "Disable Startup Delay", described there as: Removes the hidden 10-second delay Windows adds before launching startup apps.

When it helps, and when it hurts

When it helps

Getting to a usable desktop with everything loaded sooner, mainly on an SSD.

When it hurts

On a hard disk or a slow processor, everything starting at once can make the first seconds after sign-in feel slower.
It changes when startup apps load, not how fast the PC is afterwards.

What it writes

Exactly what the switch changes, read from the app's source. Switching it off is what the app writes when you turn the tweak off again.

Registry values the switch writes.
Key and value	With the tweak	Switching it off
HKCUSoftware\Microsoft\Windows\CurrentVersion\Explorer\SerializeStartupDelayInMSec	0	Not setThe value is deleted. Windows decides.

From the app's source (startup_delay_off.hpp), app 2.0.0, checked Oct 8, 2026.

The same change by hand

You do not need the app for this one. These commands make the changes from the table above. Run them in a Command Prompt opened as administrator, and make a restore point first.

Make the change · CMD

reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Serialize" /v "StartupDelayInMSec" /t REG_DWORD /d 0 /f

Put it back · CMD

reg delete "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Serialize" /v "StartupDelayInMSec" /f

See what it is set to now · CMD

reg query "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Serialize" /v "StartupDelayInMSec"

How to undo it

In the app: Yes

Switching it off sets a standard Windows value, which may not be exactly how you had it.

Switch the tweak off in Frozen Tweaks. It deletes StartupDelayInMSec, so Windows uses its built-in behavior again.

Changing several settings at once? The app's Make a restore point button, on every plan, makes a Windows restore point before you start.

Verdict

A nice quality of life change on an SSD. It does nothing for frame rates.

Questions

What does the "Disable Startup Delay" tweak change in Windows?: In the registry it sets StartupDelayInMSec to 0 under HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Serialize.
Is "Disable Startup Delay" safe to switch on?: A nice quality of life change on an SSD. It does nothing for frame rates. The main cost: On a hard disk or a slow processor, everything starting at once can make the first seconds after sign-in feel slower.
How do I undo it?: Switch the tweak off in Frozen Tweaks. Switching it off sets a standard Windows value, which may not be exactly how you had it.
Is "Disable Startup Delay" free in Frozen Tweaks?: Yes. It is one of the free tweaks, with no time limit.

In the app